Front and rear seat belt parts (especially front receivers), since they're a matter of safety
Mud flaps, since in some states those can be the difference between street legal or no
Igniter
EGR valves, for those who aren't able to desmog their rigs
Lots of other good suggestions in this thread, but those are the "big four" that I can think of. The first two being units I definitely would love to see.
Mud flaps, since in some states those can be the difference between street legal or no
Igniter
EGR valves, for those who aren't able to desmog their rigs
Lots of other good suggestions in this thread, but those are the "big four" that I can think of. The first two being units I definitely would love to see.